This Harmony XB4 plain lens modular blue pilot light is supplied with 24V AC/DC, uses an integral LED.It has a metal bezel.This pilot light, designed to last without maintenance for a bright indication of process and machine operations, is easily installed into standard 22mm diameter cut-outs and connected with simple screw-clamp connections.It is clearly distinguishable visually at a distance thanks to a bright and long lasting LED illumination.It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66 / IP67 / IP69 / IP69K, making it ideal for operation in harsh environments.